DT 400 Sensors
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Silicon Diodes response curve Lake Shore SD package repeated thermal cycling ■ Variety of packaging options ■ Lower priced version of ■ Small mass for rapid thermal response ■ Exposed flat substrate CAUTION: These sensors are sensitive to precautionary procedures when handling, or making mechanical or electrical connections to these devices in order to avoid performance degradation or loss of DT-400 Series Silicon Diodes Sealed Silicon Diode The DT-470/471 Silicon Diode temperature sensors incorporate remarkably uniform sensing elements that exhibit precise, repeatable, monotonic temperature response over a wide range. The elements are mounted into rugged, hermetically- sealed packages that have been specifically designed for proper thermal behavior in a cryogenic environment. The result is a family of sensors with temperature characteristics so predictable, tightly grouped, and stable that the sensors in most applications are routinely interchangeable with one another. DT-414 Unencapsulated Silicon Diodes The Model DT-414 uses the DT-400 bare chip Silicon Diode mounted on a flat substrate. This chip-level sensor offers minimal thermal mass and minimal physical size. Die attachment is with silver epoxy, and the chip is unencapsulated, gold wires exposed. Typical DT-400 Diode Voltage Values The Lake Shore SD Package - The Most Rugged, Versatile The SD package, with direct sensor-to- sapphire base mounting, hermetic seal, and brazed Kovar leads, provides the industry's most rugged, versatile sensors with the best sample to chip connection. Designed so heat coming down the leads bypasses the chip, it can survive several thousand hours at 500 K (depending on model) and is compatible with most ultra high vacuum applications. It can be indium soldered to samples. If desired, the SD package is also available without Kovar leads. DT-421-HR Miniature Silicon Diode The DT-421 miniature Silicon Diode temperature sensor is configured for installation on flat surfaces. The DT- 421 sensor package exhibits precise, monotonic temperature response over its useful range. The sensor chip is in direct contact with the epoxy dome, which causes increased voltage at 4.2 K and prevents full range Typical DT-400 Diode Sensitivity Values temperature (kelvin) temperature (kelvin) Lake Shore Cryotronics, Inc. e-mail: info@lakeshore.com

Standard curve Curve 10 (see next page) Max current before damage 1 mA continuous Dissipation at recommended excitation Thermal response time SD: typical <10 ms at 4.2 K; Use in radiation Recommended for use only in low level Use in magnetic field Not recommended for use in magnetic field applications below 60 K. Low magnetic field dependence when used in fields up to 5 tesla ' Short-term reproducibility data is obtained by subjecting sensor to repeated thermal shocks SoftCal™ Accuracy Calibrated Accuracy for more information see Appendices B, D, and E 3 Long-term stability data is obtained...

Silicon Diodes DT-400 Series Curve 10 Temperature Response Curve Standard Curve 10 Tolerance Bands DT-400 Series Expanded Temperature Response Data Table All DT-470, DT-471*, DT-414*, and DT-421* Silicon Diodes follow the same Curve 10 standard temperature response curve, which means they can be interchanged with one another routinely in any application utilizing this response curve. 'Partial conformances Lake Shore Cryotronics, Inc. e-mail: info@lakeshore.com

Silicon Diodes OPTIONS mountjng adapters CO adapter - spring loaded clamp for easy sensor To add Length to sensor Leads Uncalibrated sensors Calibrated sensors Sensor packages Ordering Information Uncalibrated sensor Step 1: Choose diode series, for example DT-470. Step 2: Choose package or mounting adapter—if ordering adapter, substitute the adapter suffix for the SD suffix, for Step 3: Choose tolerance band (if applicable), Diode Series- Calibrated sensor Step 1: Choose diode series, for example DT-470. Step 2: Choose package or mounting adapter—if ordering adapter, substitute the adapter...